Evaluation of Crack Growth Characteristics in Float Glass and Thermally Tempered Glass Based on the Crack Length Measurement Using Au Ion Sputtered Film
Evaluation of Crack Growth Characteristics in Float Glass and Thermally Tempered Glass Based on the Crack Length Measurement Using Au Ion Sputtered Film
复制标题
基于金离子溅射薄膜裂纹长度测量的浮法玻璃和热钢化玻璃裂纹扩展特性评价
DOI：
10.1299/kikaia.71.1708
复制
发表时间：
2005
期刊：
影响因子：
--
通讯作者：
K. Kaizu
中科院分区：
文献类型：
--
作者：
Hitoo Tokunaga;G. Deng;K. Ikeda;K. Kaizu
热钢化玻璃是将浮法玻璃加热到接近软化点后迅速冷却而制成的。热钢化玻璃表层的残余压应力使材料强化，同时材料内部也产生残余拉应力，以与表面残余压应力相平衡。据认为，由于这些残余应力的存在，热钢化玻璃的疲劳裂纹扩展特性与浮法玻璃显着不同。本研究采用离子溅射法制备的金膜和光学显微镜测量热钢化玻璃和浮法玻璃的裂纹长度，并研究这些疲劳裂纹扩展特性。结果，确认了利用Au膜的裂纹长度测量具有高测量精度。此外，还发现，与平板玻璃相比，热钢化玻璃需要更高的应力强度因子才能引起裂纹扩展。
Thermal tempered glass is made by rapidly cooling after heating float glass to near the softening point. Compressive residual stresses at the surface layer of thermally tempered glass strengthen the material, and tensile residual stresses are also generated at the same time in the interior of the material to balance with the surface compressive residual stresses. It is considered that the fatigue crack growth characteristics of thermally tempered glass are remarkably different from that of float glass, due to the existence of those residual stresses. In this study, Au film made by ion sputtering method and an optical microscope are used to measure the crack length of the thermally tempered glass and float glass, and these fatigue crack growth characteristics are investigated. As a result, it is confirmed that the crack length measurement with an Au film has high accuracy of measurement. Furthermore, it is found that the higher stress intensity factor is needed to cause the crack growth in thermally tempered glas than in flat glass.